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xen-devel
Re: [Xen-devel] Very odd filesystem problem in dom0
Yeah, I'm inclined to agree - it's a very subtle, very weird
situation.
I can confirm that it ISN'T system libraries:
"""
root@durandal:~# ldd bash-static
not a dynamic executable
root@durandal:~# ./bash-static
root@durandal:~# ls /var/adm/packages/*
: : No such file or directory
: : No such file or directory
: : No such file or directory
: : No such file or directory
...
root@durandal:~# ldd ./ls-static
not a dynamic executable
root@durandal:~# ./ls-static /var/adm/packages/*
: : No such file or directory
: : No such file or directory
: : No such file or directory
"""
Static LS fails from both inside static bash and inside dynamic bash.
It -definitely- seems to be tied to those directories - I can move the old
one, create a new one of the same name, and the new one is fine - but I can't
copy the files from the old one over:
"""
root@durandal:/var/adm# cp packages/* tem/
: `': specified destination directory does not exist
"""
I can't find any variables being set that have anything to do with the
uname, and I've run uname-variant kernels on the same slack10 base installs
before with no odd issues.
I've tried booting off the old kernel (and the install cd) and re-copying
the /var directory (mv /var /old-var, cp -av /old-var /var) so that if its
some sort of low-level fs corruption, that SHOULD get past it: No luck.
set -o xtrace shows bash is expanding the globbing correctly:
"""
root@durandal:/var/log# ls packages/*
+ /usr/bin/ls --color=auto -F -b -T 0 packages/aaa_base-10.0.0-noarch-1
packages/aaa_elflibs-9.2.0-i486-1 ...
"""
Turning off color-ls doesn't do any good, either.
Ah-hah. It was just sugested to me that the size of the directory might matter:
It's not quite the number of files, it's the lengh of the argument character
string. (Sorry, writing this email stream-of-thought as I test different
thing)
Filling a test directory with 100 files (for x in `seq 0 100`; do touch $x;
done)
doesn't trigger it, but filling a test dir with 100 files with long names
(touch aaaaaaaaaaaaaaaaaaaaaa-$x) does.
Is xeno changing the size of the exec string buffer in the kernel?
-m
On Tue, Oct 05, 2004 at 10:24:53PM +0100, Ian Pratt wrote:
> Bizarre. It's hard to figure out how Xen/Linux could be doing
> this, unless there's some terrible memory corruption going on
> that would cause things to be segfaulting or kernel oops. Xen
> just doesn't do subtle bugs ;-)
>
> Can you do an ldd on /bin/ls just to see what libraries you're
> using. Are there alternative libraries under /lib (e.g. non tls
> or non i686) that you could try?
>
> Finally, just make sure that there's nothing in your environment
> that is switching on something subtle returned from uname or
> arch...
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